Patent · US Active

Boron carbide ceramic and manufacturing method thereof

US7799715B2 · kind B2 · utility

1Cited by
2References
8Claims
0Family size

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Inventors

Key dates

Filing dateSep 12, 2008
Grant dateSep 21, 2010
Priority date—
Expiry dateFeb 4, 2029

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC04B2235/96
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

Boron carbide ceramics produced by spark sintering methods have more desirable mechanical properties than conventionally produced carbides. The boron carbide ceramics include amorphous boron, amorphous carbon, and Al2O3 powder as a sintering aid. The boron carbides may also contain a carbon nano fiber in a nearly homogeneously dispersed state. The sintered compact has a relative density of a boron carbide ceramic of approximately not less than 99%. The boron carbide ceramics are prepared preferably by subjecting a mixed powder of the starting raw materials and the carbon nano fiber to simultaneous synthesis and sintering using the spark plasma sintering method.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.